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Altimmune, Inc.

ALT
Healthcare|Biotechnology|US
$2.08
+0.11 (+5.58%)
DCF Value
$0.08
Tangible Book / Share
$2.56
Cash / Share
$1.76

Ownership Breakdown

94.4%
Float
194.5M
Shares Outstanding
183.6M
Float Shares

Major Holders (36)

Combined: 160.5%

Holders of 5%+ from their latest Schedule 13D/13G filing in the last two years. Percentages are as of each filing date.

HolderType% of ClassSharesFiledFiling
Deep Track Capital, LPIA, OO9.99%19,417,221Apr 30, 202613D/G
David KroinHC, IN9.99%19,417,221Apr 30, 202613D/G
Chen YuIndividual9.80%20,000,000May 1, 202613D/G
Deep Track Biotechnology Master Fund, Ltd.Corporation8.65%16,828,258Apr 30, 202613D/G
BlackRock, Inc.Holding company7.60%6,133,427Jul 16, 202513D/G
Viking Global Opportunities Parent GP LLCOther6.70%13,400,000May 1, 202613D/G
Viking Global Investors LPPartnership6.70%13,400,000May 1, 202613D/G
Shabet Rose SharonIndividual6.70%13,400,000May 1, 202613D/G
Halvorsen Ole AndreasIndividual6.70%13,400,000May 1, 202613D/G
Rajeev ShahHC, IN6.50%13,000,000May 1, 202613D/G
Peter KolchinskyHC, IN6.50%13,000,000May 1, 202613D/G
RA Capital Management, L.P.IA, PN6.50%13,000,000May 1, 202613D/G
RA Capital Healthcare Fund, L.P.Partnership6.50%13,000,000May 1, 202613D/G
State Street CorporationHolding company5.50%7,145,550May 12, 202613D/G
TCG Crossover Fund II, L.P.Partnership5.00%10,000,000May 1, 202613D/G
TCG Crossover GP II, LLCOther5.00%10,000,000May 1, 202613D/G
TCG Crossover Fund III, L.P.Partnership5.00%10,000,000May 1, 202613D/G
TCG Crossover GP III, LLCOther5.00%10,000,000May 1, 202613D/G
Viking Global Opportunities Illiquid Investments Sub-Master LPPartnership4.70%9,380,000May 1, 202613D/G
Viking Global Opportunities Portfolio GP LLCOther4.70%9,380,000May 1, 202613D/G
Viking Global Opportunities GP LLCOther4.70%9,380,000May 1, 202613D/G
Viking Global Opportunities Vintage IV GP LLCOther2.00%4,020,000May 1, 202613D/G
Viking Global Opportunities Vintage IV (Aggregator) LPPartnership2.00%4,020,000May 1, 202613D/G
Viking Global Opportunities Vintage IV Portfolio GP LLCOther2.00%4,020,000May 1, 202613D/G
Ameriprise Financial, Inc.Holding company1.90%1,443,932May 15, 202513D/G
Threadneedle Investment Services LimitedNon-US institution1.70%1,324,639May 15, 202513D/G
TAM UK International Holdings LimitedNon-US institution1.70%1,324,639May 15, 202513D/G
Threadneedle Holdings LimitedNon-US institution1.70%1,324,639May 15, 202513D/G
TAM UK Holdings LimitedNon-US institution1.70%1,324,639May 15, 202513D/G
Threadneedle Asset Management Holdings LimitedNon-US institution1.70%1,324,639May 15, 202513D/G
TC Financing LtdNon-US institution1.70%1,324,639May 15, 202513D/G
Threadneedle Asset Management LimitedNon-US institution1.70%1,324,639May 15, 202513D/G
Deep Track Special Opportunities Fund, LP.Partnership1.33%2,588,963Apr 30, 202613D/G
Tang Capital Partners International, LPPartnership0.30%666,022May 15, 202613D/G
Kevin TangIndividual0.30%666,022May 15, 202613D/G
Tang Capital Management, LLCOther0.30%666,022May 15, 202613D/G

Insider Trades (100)

Last 4 quarters: 1,891,997 acquired · 369,591 disposed
InsiderPositionDateTypeSharesPriceValueFiling
Greenleaf PeterdirectorNov 2, 2026AWARD160,000$2.02$323.2KForm 4
Greenleaf PeterNov 2, 2026OTHER0——Form 4
Howarth Alex G.directorNov 2, 2026AWARD160,000$2.02$323.2KForm 4
Howarth Alex G.Nov 2, 2026OTHER0——Form 4
Arbet-Engels ChristopheChief Medical OfficerOct 1, 2026OPTION EX.37,500——Form 4
Arbet-Engels ChristopheChief Medical OfficerOct 1, 2026OPTION EX.37,500——Form 4
Arbet-Engels ChristopheChief Medical OfficerOct 1, 2026TAX W/H12,679$2.76$35.0KForm 4
WEAVER GREGORY LChief Financial OfficerOct 1, 2026OPTION EX.14,475——Form 4
WEAVER GREGORY LChief Financial OfficerOct 1, 2026TAX W/H4,379$2.76$12.1KForm 4
WEAVER GREGORY LChief Financial OfficerOct 1, 2026OPTION EX.14,475——Form 4
MENZIUSO RICHARD THOMASPrincipal Accounting OfficerOct 1, 2026AWARD84,546$2.76$233.3KForm 4
MENZIUSO RICHARD THOMASPrincipal Accounting OfficerOct 1, 2026AWARD36,234——Form 4
MENZIUSO RICHARD THOMASOct 1, 2026OTHER0——Form 4
Richardson Linda MChief Commercial OfficerSep 16, 2026OPTION EX.24,000——Form 4
Richardson Linda MChief Commercial OfficerSep 16, 2026OPTION EX.24,000——Form 4
Richardson Linda MChief Commercial OfficerSep 16, 2026TAX W/H6,826$3.24$22.1KForm 4
Durso Jerome Benedictdirector, officer: President and CEOAug 13, 2026BUY15,000$2.95$44.3KForm 4
WEAVER GREGORY LChief Financial OfficerJul 31, 2026AWARD1,753$2.41$4.2KForm 4
Roberts M ScotChief Scientific OfficerJul 31, 2026AWARD875$2.41$2.1KForm 4
Lawver Teri LdirectorMay 1, 2026AWARD48,800$2.82$137.6KForm 4
Sohn Catherine A.directorMay 1, 2026AWARD48,800$2.82$137.6KForm 4
Jorkasky DianedirectorMay 1, 2026AWARD48,800$2.82$137.6KForm 4
Schafer KlausdirectorMay 1, 2026AWARD48,800$2.82$137.6KForm 4
Pisano WaynedirectorMay 1, 2026AWARD48,800$2.82$137.6KForm 4
Hodges PhilipdirectorMay 1, 2026AWARD48,800$2.82$137.6KForm 4
GILL JOHNdirectorMay 1, 2026AWARD48,800$2.82$137.6KForm 4
SAYARE MITCHELdirectorMay 1, 2026AWARD48,800$2.82$137.6KForm 4
GILL JOHNdirectorApr 6, 2026BUY9,200$3.41$31.3KForm 4
WEAVER GREGORY LChief Financial OfficerApr 1, 2026BUY10,000$3.15$31.5KForm 4
Durso Jerome Benedictdirector, officer: President and CEOApr 1, 2026BUY15,000$3.14$47.1KForm 4
WEAVER GREGORY LChief Financial OfficerMar 6, 2026BUY5,000$3.54$17.7KForm 4
Durso Jerome Benedictdirector, officer: President and CEOMar 6, 2026BUY20,000$3.54$70.8KForm 4
Roberts M ScotChief Scientific OfficerFeb 26, 2026AWARD222,670$4.46$993.1KForm 4
Roberts M ScotChief Scientific OfficerFeb 26, 2026AWARD95,430——Form 4
WEAVER GREGORY LChief Financial OfficerFeb 26, 2026AWARD259,000$4.46$1.2MForm 4
WEAVER GREGORY LChief Financial OfficerFeb 26, 2026AWARD111,000——Form 4
Roberts M ScotChief Scientific OfficerFeb 2, 2026OPTION EX.7,775——Form 4
Roberts M ScotChief Scientific OfficerFeb 2, 2026TAX W/H2,329$5.55$12.9KForm 4
Roberts M ScotChief Scientific OfficerJan 31, 2026AWARD5,567$3.07$17.1KForm 4
Roberts M ScotChief Scientific OfficerJan 30, 2026OPTION EX.9,275——Form 4
Roberts M ScotChief Scientific OfficerJan 30, 2026TAX W/H2,859$5.60$16.0KForm 4
Roberts M ScotChief Scientific OfficerJan 30, 2026OPTION EX.9,275——Form 4
Roberts M ScotChief Scientific OfficerFeb 2, 2026OPTION EX.7,775——Form 4
Garg Vipin KdirectorJan 30, 2026OPTION EX.26,775——Form 4
Garg Vipin KdirectorJan 31, 2026AWARD6,926$3.07$21.3KForm 4
Garg Vipin KdirectorJan 30, 2026TAX W/H11,632$5.60$65.1KForm 4
Garg Vipin KdirectorJan 30, 2026OPTION EX.26,775——Form 4
Jordt Raymond MChief Business OfficerJan 31, 2026AWARD4,571$3.07$14.0KForm 4
Jordt Raymond MChief Business OfficerJan 27, 2026OPTION EX.15,850——Form 4
Jordt Raymond MChief Business OfficerJan 27, 2026TAX W/H4,229$6.18$26.1KForm 4
Jordt Raymond MChief Business OfficerJan 27, 2026OPTION EX.15,850——Form 4
Garg Vipin KdirectorJan 27, 2026OPTION EX.41,200——Form 4
Garg Vipin KdirectorJan 27, 2026TAX W/H17,898$6.18$110.6KForm 4
Garg Vipin KdirectorJan 27, 2026OPTION EX.41,200——Form 4
Roberts M ScotChief Scientific OfficerJan 27, 2026OPTION EX.15,850——Form 4
Roberts M ScotChief Scientific OfficerJan 27, 2026TAX W/H4,748$6.18$29.3KForm 4
Roberts M ScotChief Scientific OfficerJan 27, 2026OPTION EX.15,850——Form 4
Jordt Raymond MChief Business OfficerJan 25, 2026OPTION EX.14,600——Form 4
Jordt Raymond MChief Business OfficerJan 25, 2026TAX W/H3,855$5.50$21.2KForm 4
Jordt Raymond MChief Business OfficerJan 25, 2026OPTION EX.14,600——Form 4
Garg Vipin KdirectorJan 25, 2026OPTION EX.42,050——Form 4
Garg Vipin KdirectorJan 25, 2026TAX W/H17,984$5.50$98.9KForm 4
Garg Vipin KdirectorJan 25, 2026OPTION EX.42,050——Form 4
Roberts M ScotChief Scientific OfficerJan 25, 2026OPTION EX.14,600——Form 4
Roberts M ScotChief Scientific OfficerJan 25, 2026TAX W/H4,373$5.50$24.1KForm 4
Roberts M ScotChief Scientific OfficerJan 25, 2026OPTION EX.14,600——Form 4
Pisano WaynedirectorJan 8, 2026BUY5,000$4.08$20.4KForm 4
Jordt Raymond MChief Business OfficerJan 1, 2026OPTION EX.9,375——Form 4
Jordt Raymond MChief Business OfficerJan 1, 2026TAX W/H2,475$3.61$8.9KForm 4
Jordt Raymond MChief Business OfficerJan 1, 2026OPTION EX.9,375——Form 4
Sohn Catherine A.directorJan 5, 2026BUY500$4.24$2.1KForm 4
Jorkasky DianedirectorDec 29, 2025BUY527$3.80$2.0KForm 4
GILL JOHNdirectorDec 23, 2025BUY12,500$4.10$51.2KForm 4
Durso Jerome BenedictdirectorDec 22, 2025BUY12,500$4.13$51.6KForm 4
Durso Jerome Benedictdirector, officer: CEO-electDec 1, 2025AWARD1,824,400$4.93$9.0MForm 4
Durso Jerome Benedictdirector, officer: CEO-electDec 1, 2025AWARD633,700——Form 4
WEAVER GREGORY LChief Financial OfficerNov 11, 2025OPTION EX.18,750——Form 4
WEAVER GREGORY LChief Financial OfficerNov 11, 2025OPTION EX.18,750——Form 4
WEAVER GREGORY LChief Financial OfficerNov 11, 2025TAX W/H5,672$4.28$24.3KForm 4
WEAVER GREGORY LChief Financial OfficerOct 1, 2025AWARD166,800$3.87$645.5KForm 4
WEAVER GREGORY LChief Financial OfficerOct 1, 2025AWARD57,900——Form 4
Arbet-Engels ChristopheChief Medical OfficerOct 1, 2025AWARD450,000$3.87$1.7MForm 4
Arbet-Engels ChristopheChief Medical OfficerOct 1, 2025AWARD150,000——Form 4
Arbet-Engels ChristopheofficerOct 1, 2025OTHER0——Form 4
Sohn Catherine A.directorSep 25, 2025AWARD48,800$3.92$191.3KForm 4
Durso Jerome BenedictdirectorSep 25, 2025AWARD48,800$3.92$191.3KForm 4
Lawver Teri LdirectorSep 25, 2025AWARD48,800$3.92$191.3KForm 4
Jorkasky DianedirectorSep 25, 2025AWARD48,800$3.92$191.3KForm 4
GILL JOHNdirectorSep 25, 2025AWARD48,800$3.92$191.3KForm 4
GILL JOHNdirectorJan 6, 2022GIFT2,714——Form 4
Schafer KlausdirectorSep 25, 2025AWARD48,800$3.92$191.3KForm 4
SAYARE MITCHELdirectorSep 25, 2025AWARD48,800$3.92$191.3KForm 4
Hodges PhilipdirectorSep 25, 2025AWARD48,800$3.92$191.3KForm 4
Pisano WaynedirectorSep 25, 2025AWARD48,800$3.92$191.3KForm 4
Richardson Linda MChief Commercial OfficerSep 16, 2025AWARD278,000$3.63$1.0MForm 4
Richardson Linda MChief Commercial OfficerSep 16, 2025AWARD96,000——Form 4
Richardson Linda MofficerSep 16, 2025OTHER0——Form 4
Jordt Raymond MChief Business OfficerJul 31, 2025AWARD1,368$3.14$4.3KForm 4
Harris Matthew ScottChief Medical OfficerJul 31, 2025AWARD2,018$3.14$6.3KForm 4
Roberts M ScotChief Scientific OfficerJul 31, 2025AWARD846$3.14$2.7KForm 4